Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province

Autores
Gargiulo, M.F.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The study of mineral assemblages and metamorphic facies in rocks exposed on the eastern margin of Brazo Huemul, Nahuel Huapi Lake, allowed the reconsideration of the temporal succession of units whose outcrops are isolated and difficult to locate due to the exuberant forest that covers the southestern part of Neuquén province. The rocks exposed in the study area are mainly of tonalitic composition and have been correlated with the Subcordilleran Patagonian Batholith because they are crosscut by two different types of dikes. One group of dikes shows an albite -chlorite - epidote - cummingtonite/grunerite -hornblende mineral assemblage as a consequence of a thermal metamorphic event transitional between albite - epidote hornfels facies and hornblende hornfels conditions. This process has been attributed to the emplacement of the Cordilleran Patagonian Batholith of Cretaceous age. Because of this, the hornfels dikes were correlated with Montes de Oca Formation. The other group of dikes shows a chlorite + pumpellyite + kumontite + chlorite/esmectite + iron oxides assemblage indicating metamorphism in zeolite facies of high temperature or, sometimes shows propilitic alteration and these dikes have been correlated with the Ventana Formation. The differences between these two types of dikes allow the discussion of the relative age of the tonalitic rocks that host them. In this paper it is proposed that this tonalitic body is of Low to Middle Jurassic age. © 2006 Asociación Geológica Argentina.
Fil:Gargiulo, M.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Rev. Asoc. Geol. Argent. 2006;61(2):218-230
Materia
Basic dikes
Brazo Huemul
Cordilleran Patagonian Batholite
Subcordilleran Patagonian Batholite
Thermal metamorphism
batholith
Cretaceous
dike
metamorphic facies
metamorphism
zeolite
Argentina
Brazo Huemul
Nahuel Huapi Lake
Neuquen
South America
Oxalis tuberosa
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00044822_v61_n2_p218_Gargiulo

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oai_identifier_str paperaa:paper_00044822_v61_n2_p218_Gargiulo
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province Gargiulo, M.F.Basic dikesBrazo HuemulCordilleran Patagonian BatholiteSubcordilleran Patagonian BatholiteThermal metamorphismbatholithCretaceousdikemetamorphic faciesmetamorphismzeoliteArgentinaBrazo HuemulNahuel Huapi LakeNeuquenSouth AmericaOxalis tuberosaThe study of mineral assemblages and metamorphic facies in rocks exposed on the eastern margin of Brazo Huemul, Nahuel Huapi Lake, allowed the reconsideration of the temporal succession of units whose outcrops are isolated and difficult to locate due to the exuberant forest that covers the southestern part of Neuquén province. The rocks exposed in the study area are mainly of tonalitic composition and have been correlated with the Subcordilleran Patagonian Batholith because they are crosscut by two different types of dikes. One group of dikes shows an albite -chlorite - epidote - cummingtonite/grunerite -hornblende mineral assemblage as a consequence of a thermal metamorphic event transitional between albite - epidote hornfels facies and hornblende hornfels conditions. This process has been attributed to the emplacement of the Cordilleran Patagonian Batholith of Cretaceous age. Because of this, the hornfels dikes were correlated with Montes de Oca Formation. The other group of dikes shows a chlorite + pumpellyite + kumontite + chlorite/esmectite + iron oxides assemblage indicating metamorphism in zeolite facies of high temperature or, sometimes shows propilitic alteration and these dikes have been correlated with the Ventana Formation. The differences between these two types of dikes allow the discussion of the relative age of the tonalitic rocks that host them. In this paper it is proposed that this tonalitic body is of Low to Middle Jurassic age. © 2006 Asociación Geológica Argentina.Fil:Gargiulo, M.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00044822_v61_n2_p218_GargiuloRev. Asoc. Geol. Argent. 2006;61(2):218-230reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:42:57Zpaperaa:paper_00044822_v61_n2_p218_GargiuloInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:42:58.943Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
title Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
spellingShingle Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
Gargiulo, M.F.
Basic dikes
Brazo Huemul
Cordilleran Patagonian Batholite
Subcordilleran Patagonian Batholite
Thermal metamorphism
batholith
Cretaceous
dike
metamorphic facies
metamorphism
zeolite
Argentina
Brazo Huemul
Nahuel Huapi Lake
Neuquen
South America
Oxalis tuberosa
title_short Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
title_full Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
title_fullStr Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
title_full_unstemmed Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
title_sort Metamorphic fades and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province
dc.creator.none.fl_str_mv Gargiulo, M.F.
author Gargiulo, M.F.
author_facet Gargiulo, M.F.
author_role author
dc.subject.none.fl_str_mv Basic dikes
Brazo Huemul
Cordilleran Patagonian Batholite
Subcordilleran Patagonian Batholite
Thermal metamorphism
batholith
Cretaceous
dike
metamorphic facies
metamorphism
zeolite
Argentina
Brazo Huemul
Nahuel Huapi Lake
Neuquen
South America
Oxalis tuberosa
topic Basic dikes
Brazo Huemul
Cordilleran Patagonian Batholite
Subcordilleran Patagonian Batholite
Thermal metamorphism
batholith
Cretaceous
dike
metamorphic facies
metamorphism
zeolite
Argentina
Brazo Huemul
Nahuel Huapi Lake
Neuquen
South America
Oxalis tuberosa
dc.description.none.fl_txt_mv The study of mineral assemblages and metamorphic facies in rocks exposed on the eastern margin of Brazo Huemul, Nahuel Huapi Lake, allowed the reconsideration of the temporal succession of units whose outcrops are isolated and difficult to locate due to the exuberant forest that covers the southestern part of Neuquén province. The rocks exposed in the study area are mainly of tonalitic composition and have been correlated with the Subcordilleran Patagonian Batholith because they are crosscut by two different types of dikes. One group of dikes shows an albite -chlorite - epidote - cummingtonite/grunerite -hornblende mineral assemblage as a consequence of a thermal metamorphic event transitional between albite - epidote hornfels facies and hornblende hornfels conditions. This process has been attributed to the emplacement of the Cordilleran Patagonian Batholith of Cretaceous age. Because of this, the hornfels dikes were correlated with Montes de Oca Formation. The other group of dikes shows a chlorite + pumpellyite + kumontite + chlorite/esmectite + iron oxides assemblage indicating metamorphism in zeolite facies of high temperature or, sometimes shows propilitic alteration and these dikes have been correlated with the Ventana Formation. The differences between these two types of dikes allow the discussion of the relative age of the tonalitic rocks that host them. In this paper it is proposed that this tonalitic body is of Low to Middle Jurassic age. © 2006 Asociación Geológica Argentina.
Fil:Gargiulo, M.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description The study of mineral assemblages and metamorphic facies in rocks exposed on the eastern margin of Brazo Huemul, Nahuel Huapi Lake, allowed the reconsideration of the temporal succession of units whose outcrops are isolated and difficult to locate due to the exuberant forest that covers the southestern part of Neuquén province. The rocks exposed in the study area are mainly of tonalitic composition and have been correlated with the Subcordilleran Patagonian Batholith because they are crosscut by two different types of dikes. One group of dikes shows an albite -chlorite - epidote - cummingtonite/grunerite -hornblende mineral assemblage as a consequence of a thermal metamorphic event transitional between albite - epidote hornfels facies and hornblende hornfels conditions. This process has been attributed to the emplacement of the Cordilleran Patagonian Batholith of Cretaceous age. Because of this, the hornfels dikes were correlated with Montes de Oca Formation. The other group of dikes shows a chlorite + pumpellyite + kumontite + chlorite/esmectite + iron oxides assemblage indicating metamorphism in zeolite facies of high temperature or, sometimes shows propilitic alteration and these dikes have been correlated with the Ventana Formation. The differences between these two types of dikes allow the discussion of the relative age of the tonalitic rocks that host them. In this paper it is proposed that this tonalitic body is of Low to Middle Jurassic age. © 2006 Asociación Geológica Argentina.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_00044822_v61_n2_p218_Gargiulo
url http://hdl.handle.net/20.500.12110/paper_00044822_v61_n2_p218_Gargiulo
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Rev. Asoc. Geol. Argent. 2006;61(2):218-230
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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